Valve grinder



March 4, 1930. E. H. PETERSON ET AL VALVE GRINDER Filed Aug. 29. 1927 {Ptented Mar. 4, 1930 EDWARD: ir-nnnvirnrnnson AND ILLIAM 17L ODLUM,,0'FCHICAGO, ILLINOIS, As-

sren'ons ommo METAL rnonuc'rsfcoivirmvy, F cHIcaG iLLINoIs, A CORPO-YVRATION on iLLiNOIS VALVE GRINDER Appilication filed August 29,1927.Serial No. 216,042".

4 The present invention relates to devices on the, valves ofa types: ofmotors. 7 '3 Another of the objeotsof our invention is assemblycomprising for I grinding or refacingvalves, and particu-' larly valvesI employed in of the :poppet type commonly internal combustion engines;

One of the objects of our'invention is the provision'ofa valvegrinder-of the classdescribed which is more simple, durable andeconomical than the valve grinders" of the priorartand which may beconstructed-more.

cheaply, comprising a small number of parts an'd means" for ad ptingthedevice for use great number of different the provision of asimplified valve grinder a cast metal casing having an integral handle,acover for said cas 1ng,= a novel andsimple' chuck rotatably t tion willappear-mo I mounted in the same,

means for oscillating" said jchuck, and'a crank for, actuating saidmeans; v j iv j, I Other objects and advantagesof our inven-' re fullyfrom the follow-.

, ingdescription and from the accompanying drawings i in which similarcharacters of reference indicate similar parts throughout the severalviews.

= valve engaging plate; an

- Referring .to the drawingsinternalmechanism;

grinder with the 5 Fig. 2 is an elevational view of the same on thelines 2-2 of Fig. 1 in partial cross-e section -Fig. 3is'-a detail viewof one or thebits and Fig i l is a detail 1 view of "another'valvc nsagmP Referring to Fig, 1, 10 indicates inits en--- valve grinding devicewhich comtirety our prises a, castsmetalcasing 11, having anfinmeg-m1handle 12, a. rotatable shaft 13 for a of actuatingv mechanism which isindicated in;

i ,q huck adaptedto support a b t Mcar ying a valve engaging plate Thecasing 11 encloses and supports a simplified assembly ire y y he,numeral 16., l

, I, are :casing 11 is preferably Emma is, small as is possible 'to'enclose 'the 'actuati'ng 'mechanism-- 16', and for this purpose-the cas,stantially pear shape,

vcrank 30, further to be described.

securing a of the screw a flat wall 17 of subbounded by an up- 18forming an upper ing may be made with wardly extending wall opening 19of the same shape. The wall 18 may be appropriately thickened at aplurality of points, such as the points 20, 21 and 22, to providesufficient material for threaded vapertures 23 employed in securing thecover24 by screw bolts 25; The threaded apertures 23 maybe located atany points which will not interfere with the interior actuatingmechanism 16;

- The cover 24 comprises a fiat plate of metal of substantially the sameoutline as the wall 17 of the casing and adapted to fit'upon the opening19, being secured upon the casing by, the screw bolts 25 passing throughsaid cover intothe threaded apertures 23. The casing may be formedwithan integral handle 12 at its top, and the handle 12 may be of anyconvenient shape which will enable the operator to'grasp the to of thecasing and exert'a force downward upon the bit 14.

The casing 11 is preferably formed with an outwardly projecting boss 26extending at right angles to the rear wall 17 and provided with a bore27 adapted to'form a bearing for I a shaft 28. Fig. l'is an elevationalview of our/valve cover removed to show the I The boss 26 also projects': slightly into the interior of the casing, as at 29, forming athrustbearing inside the casing for a The shaft 28 comprises asubstantially cylindrical memberadapted to fit the bore 27 and having areduced outer end31 which is threaded to receive a'threaded collar 32and a crank 33 1 having a'threaded aperture 34. The reduced end 31' onthe shaft 28 forms a shoulder against which the collar 32 may be screwedto fix this collar on the shaft 28 and the crank 33 may act like alocknut against the collar 32 securely fastening the crank upon theshaft28. Y I r v The crank 33 comprises a strip of sheet metal ofappropriate length having the threaded aperture 34 at one end to fit there duccd end 31, and a second threaded aperture 36 at the opposite endadapted vto fit thethreaded end'37 of a screw bolt for rotatably knob38on said crank. The head bolt 37 may be prevented from binding againstthe knob 38 providing a limited thread on the bolt 37 so that itcannotbe threaded in far enough to pinch the knob' 38.

Theca sing 11 is also formediwitli a downwardly extending boss-39extending from the bottom of the easing at substantially right angles tothe bearing 27 and provided with an enlarged bore 40 and a counterbore41.

The boss 39 also project-supwardinto the.

larged bore 40 is also provided with second washer 46,,- and a pluralityof ball bearings .47. are confined between 4,6 to provide anantirtriction thrust bearing for the shaft 13. The lower end of theshaft 13 is provided with a slot 48 and is threaded,

the inner trusto-conical provided with a bore the washers and as at49,to receivethe internally threaded sleeve The slot48 should preferablyeX- tend to such a distance that the split portions of the shaft13 maybe cammed together by sleeve 50, and the split end of the shaft 13 is52adapted to the reduced end 53. of a bit 14.

The sleeve 50 comprises a substantially cylindrical member having anouter knurled surface 54 andan internally threadod'surfacef55, as wellas the TIUSlQOrCOIllCfil surface end of the shaft 13, asat 57, may befurther reduced, remov ng the threads 49. and taper-' ing the end of theshaft to frusto-conical form .40 also prov ded with a to fitv wi hin thesurface 5-1.' The shaft 13 is and traversing the here The bit, 14comprises drica'l metalmember having endb3torming a 52at its upper end.a substantially cylinareduced upper maybe milled away'as at to provide anon-circular end 6lwhioh will just pass the pin 58 and prevent relativerotation between the bit 14 and the shaft113. The non circular portion61 maybe tapered so astocome into wedging thus be observed that thereduced end 53 may be inserted through the aperture 56 in the sleeve 50into the bore 52 untilthe non-circu- V lar end 61engages the pin 58';after which the sleeve 50 may be threaded on theshaftgl, the

frusto-eonical surface 51' camming the. two split ends of the shafttogether to clamp the reduced end 5370f the-bit, The simple chuckthusprovided may be manufactured at a very low cost and with a minimumofmachining operations.

' and bore 66 securing surface 51 of the 51 terminating in the bore. 56.The extreme ing a pini pin 58 riveted the-reinlimiting shoulder 59, andthe-extreme end of the'reduced portion- 53 engagement, with the pin'58.Itwill The, lower end: of the-bit. 14 is provided witha sl-,0t,..a -a62,5, adaptedto receive; a plu-,

rality of plates 15, 63 and 64 of varyingsizes" All of the plates motorsof difierent types.

15,63 and 64 are provided with central apertures 65 adapted toregisterwith a bore 66 passing through theendof the shaft lid-across theslot 62; The plates may be stamped from. sheet metal to the variousshapes and sizes shown, and the upperfiat edge 67oftheplateshouldengagethe base of theslot62 when the cotter pin 68 passes hroughtheapertures Referring to Fig.1, the plate 15 is substantiallyrectangularat its upper end, tapering atits lower e-nd 69 somewhat afterthe manner of a screw-driven; and I the lower vend is adapted to engagein a slot 7 0 in thevalve .71; e 1 1M95 f intended o ng g w hvalves oflarger size, being' of substantiallyreetang-ular shape with-outwardlyextending lugs 72 at one sidespaeed as far as possible and outwardlyextending lugss73 onthe op,- posite side spaced, a les se r diStance aap ed ofit ad 'feli e ltttyp of,valve.' In a similar. manner theplafie64has a pair of lugs 74 on one side spaced a distance greater: than spacedstill more than the lugs 74; thereby p ng a-se e of valve engagingmembers which: are adapted to fit valves of: practically any commercialintern l combustion engine;

these parts together. I

and;

that of the lugs 7 2, while the lugs 75, are

The v evise- .al o prele bly; provid d wi h a PPerlend fthesheftwlaisrduced;

'ngash ulder 78 f0riS PP rt as a 7. p

erably flattened'on onesilde asat 80, and the.

' Thereducedcend 77; iszpre'f pinion 7 9 may comprise a stamped sheetmetal member having; teeth 81. and? a central, aper-* ture with acomplementary flattened side.

The end shaft may be-"further re duced and threadedto receive.aniinternally threadednut 83-a-ndthe-pinion79 isrprefery s cur d bymeans. of said nut: with a Washer 84. I I The; wall 17 of. the casing"maybe provid d withanother boss 85:1having a: threaded bore 7 8,6;and'projecting in the casing as at-87 to form a thrust bearing for asegmental gear 7. l .88. The segmental'gear- 88 'comprises a stampedsheet,metali-inember having a plurality' of teeth 89" which are",vcomplementaryg the te fih l Ofthe pinion vand having a bore 90 locatedat the center ol curvaturef I The segmental gear88: may be rotatablysupported in'the casing by a screw bolt 91 having. a reduced threadedportion 92am an annular:

shoulder-'68. Theshouldertlid is adaptedjto, 1

th inward h adi g mev m n of? he o t. .1 so: th t the gearz88 is:rotatably sup-.1

. arted n the boltwithout being n between the head and the boss 87.

' the crankSO are both procompressed The gear88 and vided withcountersunk apertures 94 which are adapted to receive bolts 95 ofsimilar shape to the bolt 91.' The bolts 95 pass through a sheet metallink 96 into the counotersunk bores 30, respectively, and when.thebolts95 have 94fon the gear 88 and crank been riveted in the counterboresthey provide a pivotal connection for these parts Which will not bindthelink. The crank 30 may also I be provided with acountersu'nk bore 97which is adapted to receive 1,

I the reduced end 9 8 of the shaft 28, the end of the shaft beingriveted in said bore to fix the crank on'said shaft. The link 96issli'ghtly curved in order to avoid interference with the casing at 21and 7 -with the'screw bolt 91.

' The assembly of the foregoing parts will be obvious to one skilled inthe art, but a con-' venient methodof assembly is to perform theriveting operations which secure the shaft andgear 88 together first,after-which these'parts may be placed in the casing and secured bythebolt 91. The

, shaft 13 may then be assembled with its ball on the gear is 7 lengthof the i valve grinding devices of specific embodiment.

,o bearing in the bore 41 and H cured on the end of the'shaft follows:The grinder appropriate bit and fit the valves of the tor, and anappropriate valve grinding comp :The val I inthe slotin the valve andbearing down upon the pinion 79 se by the nut83.

The operation of our valve grinder is as is provided with an valveengaging plate to, internal, combustion mopound maybe applied to thevalve seat 99. ve engaging plate 15 may be placed J thehandle 12,'themechanismgmay be operated by; rotating the crank 33 It is obviousthatthe crank 30 will impart an oscillating I motion to the segmentalgear 88 because the distance between the bolt91 and the rivet 95 crank30. Th

cillatingfmotion to, the shaft 13 and valve 71,

irotating the valve back and forth upon its seat and grinding away theirregularities of the valve and seatgto produce a good fit.

' While we are aware that'many complicated the-class described have beenmade, most of these devices embody so many different parts that they aredifficult and expensive to manufacture and asi assembly semble, and wehave provided a simplified of mechanical elements and structure whichwill perform the operation efii ciently;and economically and which maybe manufacturedat a very small cost.

- WVhilewe have illustrated and described a of our invention, manymodifications may be made without departing from thespirit of theinvention, and we do if not wish to be limited to the precise detailsof" the construction set forth, but desire to substantially greater thanthe e segmental gear will engage the pinion-79 and impart an os-' availourselves of all changes within the scope 1 of the appended claim.

Having thus described our invention, what we claimas new and desire tosecure by LettersPatent of the United States is:

In a valve grinder, the combination of an elongated supporting casinghaving a pair of transverse bores with a rotatably mounted in one ofsaid bores and extending in the direction of the longitudinal axis ofthe'casing, a'counterbore about said shaft, a pair of Washers in saidcounterbore, ball bearings between said washers in said counterbore, anannular shoulder carried by said shaft for engaging one of said washers,a pinion carried by said shaft in said casing, a sheet metal segmentalgear having radial teeth on its periphery rotatably mounted in saidcasing in vertical position to engage said pinion at right anglesthereto, a second shaft rotatably mounted in the other bore of saidcasing, a crank lever fixedly secured to said second shaft, a crank foractuating said second shaft, pivot posts riveted to said crank lever andto said segmental gear, and a connecting link pivotally secured to saidcrank lever and said segmental gear by said pivot posts, said cranklever being of less length than the radial distance of the pivot post onsaid segmental gear from the axis of said segmental gear. 7

In witness whereof, we hereunto subscribe our names this 26 day ofAugust, 1927.

EDWARD HENRY PETERSON. WILLIAM H. ODLUM.

valve actuating shaft 8

